Wedge boundary elements for 2D problems with corner points

被引：3

作者：

Koshelev, Vadim ^{[2
]}

Ghassemi, Ahmad ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Petr Engn, College Stn, TX 77843 USA

[2] Russian Acad Sci, Inst Problems Mech Engn, St Petersburg 199178, Russia

来源：

ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS | 2008年 / 32卷 / 02期

关键词：

kinks; branched cracks; wedge boundary element; non-local strength criteria;

D O I：

10.1016/j.enganabound.2007.07.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The paper presents results of 2D numerical experiments for calculating stress intensity factors (SIFs) for kinked and branched cracks using a Complex Variable Boundary Element Method. Both conventional (ordinary and tip) and singular wedge elements are utilized in the numerical scheme. The latter are characterized by specific asymptotes for the stress and displacement behavior in the vicinity of the corner points. The accuracy of SIFs calculations for small and "very" small kinks is evaluated and the role of wedge elements in improving the accuracy is studied. The perspectives for implementation of a non-local strength criterion of the Neuber-Novozhilov type in the Boundary Elements technique for kinked and intersecting cracks using wedge elements are described. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：168 / 175

页数：8

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